Thanks
Your drawing looks right - just remember to connect GPS TX and RX to RX and TX on Arduino to get data. The signal from the current-sensor should also be connected, but start with just Arduino and MAX7456 shield.

Dennis,

I came home and wired it up. Before I plugged the OSD into the video stream, I made sure I had a good picture with the camera etc. Then I plugged in the OSD and no change. So I redid the diagram just to be sure and rewired it....still no numbers etc.
Hmm...I'm suspicious of the connections to the mini pro.
I can't make sense of the your original schematic verses what you emailed me here?
Looks like HSYNC, VSYNC and LOS all need to go to VCC through 1K resistors ....yes?

I came home and wired it up. Before I plugged the OSD into the video stream, I made sure I had a good picture with the camera etc. Then I plugged in the OSD and no change. So I redid the diagram just to be sure and rewired it....still no numbers etc.
Hmm...I'm suspicious of the connections to the mini pro.
I can't make sense of the your original schematic verses what you emailed me here?
Looks like HSYNC, VSYNC and LOS all need to go to VCC through 1K resistors ....yes?

In that drawing you should connect 5 v directly to Vcc and not Raw (Raw should only be used if you connect a supply > 5 volt). If you connect to Raw it will use onboard voltage regulator. With just 5 volt input it will only give ~4 volt out. MAX7456 can't run below 4.75 volt.

When you tested with Uno, did you connect directly to the USB-port (for power) or same problem with 5 volt connected to Raw?

I will just check my connections when I get home..
(Just to be sure, you should be using 16 MHz crystal and not 8MHz)

Dennis,
OK...when I get a few minutes I will hook it all up like this (see pict) and power it from the USB for now. I'll let you know what I find
Rick

One thing to try out is to use a 10kOhm pullup resistor between 5V and the RESET pin. This is something I picked up from the Aeroquad forum which uses the same board for OSD. WIthout it the MAX board keeps resetting.

If you can't get it working, lI can try to dig out some of the old code I have laying about for arduino. Its been over a year since I played with the MAX board, but it shouldn't be that difficult to get a picture from it when hooked up to the DUE.

One thing to try out is to use a 10kOhm pullup resistor between 5V and the RESET pin. This is something I picked up from the Aeroquad forum which uses the same board for OSD. WIthout it the MAX board keeps resetting.

If you can't get it working, lI can try to dig out some of the old code I have laying about for arduino. Its been over a year since I played with the MAX board, but it shouldn't be that difficult to get a picture from it when hooked up to the DUE.

- Thomas

10K pull-up resistor is the "normal" thing to do with reset-pins etc. but as the direct connection to Vcc is recommended in the datasheet, I would be surprised it that's the problem.

10K pull-up resistor is the "normal" thing to do with reset-pins etc. but as the direct connection to Vcc is recommended in the datasheet, I would be surprised it that's the problem.

Nevertheless - it's worth a try

OK - hooked it up as in the last schematic - started with a good video - then I inserted our project - no difference - I did note that when only the output to the screen was connected the screen went from no signal to a gray screen when connected - then when I hook up the camera the screen shows what the camera see's - no OSD yet ?

OK - hooked it up as in the last schematic - started with a good video - then I inserted our project - no difference - I did note that when only the output to the screen was connected the screen went from no signal to a gray screen when connected - then when I hook up the camera the screen shows what the camera see's - no OSD yet ?

But SCK, MISO, MOSI and SS is still on pin 13, 12, 11 and 10? I don't quite understand why you use pin 5, 4, 3 and 2?